Loose pulley



C. 1l, 1932. Q Y, MALCQLM 1,881,780

LOOSE PULLEY Filed March 25,l 195o E i El. E, GY Mahan Patented Get. 11, 1932 UNETED STATES .PATENTE oFFlcE GEORGE Y.`1VIALCOL1V[, OF TORONTO, ONTARIO, CANADA Loosn PULLEY Application filed March 25,:1930. Serial No. 438,839.

This invention relates to pulleys, and particularly to' that class adapted for use as idlers. My object is to devise'a pulley hav-l ing an internal reservoir for oil for lubrication of the shaft. While such pulleys are Vnot broadly new, they have heretofore been of a more or less complicated nature involvingv making the pulley of two or more parts struction hereinafter described and illus- In the drawing like numerals of reference indicate corresponding parts inthe different gures. y

l indicates the shaft on which the pulley 2 is mounted. The pulleyis of integral con# struction and has in its inner surface an undercut annular oil chamber 3 of considerable width. The mouth of the oil chamber, is itself ofconsiderable width, and fitted on the shaft and extending into this chamber is an oil distributor 4. Fitted between the shaft and the pulley are two sleeves 5, one at each side of the distributor. The adjacent ends of the sleeves 5 are, however, spaced apart suiiiciently to allow considerable play of the distributor 4.

The sleeves 5 are each provided with an annular collecting groove 6 in their inner surface adjacent their outer end and on the outer surface of each sleeve is formed one or more grooves 7 extending longitudinally of the shaft and leading back to the oil chamremoved from or The distributor4 is formed as a ring ittin the shaft l and having one or more threade `holes therein `in which is or are tted pins 9. rlhroughthe face of the pulley opposite the distributor 4 is a hole 10, which is normally closed by a suitable plug. This hole not only may be used for filling purposes, but by means of a suitable tool, the pins 9 may be positioned in the ring of the distributor.

The operation of the device is as follows. The oil chamber 3 is lilled at least partially l with oil. As the pulley revolves on the shaft which is then stationary, oil is collected from the back of the recess by the pins 9 and is led to the shaft along which it travels outwardly in the grooves 8 in the sleeves to lubricate the shaft l. The oil is collected in the annular grooves 6 and passes to the outer grooves 7 and led back to the oil reservoir 3.'

The ring 4, it will be noticed, is of reduced width intermediate the pins. The reason for this is that if the ring moves over against either of the sleeves 5, oil will be Vermitted to Aflow between the ring and the a jacent ledge ofthe ange.

A set screw or other means may be employed to prevent relative movement between the shaft and distributor.

v Whatl claim as my invention is l. The combination with a shaft of an integral pulley rotatable relative to the shaft, said pulley having an annular oil reservoir in its inner surface; sleeves fitted on said shaft within the pulley one at each side of the oil reservoir, the inner ends of said sleeves being spaced from one another, each of said sleeves having an annular collecting groove on its inner surface adjacent its outer end; a longitudinal groove in its inner face leading from the space between the sleeves; a longitudinal groove in its outer face leading from the collecting groove back to the oil reservoir; and an oil distributor mounted on said shaft between the sleeves, the sides of said distributor being serrated to permit oil to enter between the edge of the ring and the adjacent edge of the sleeve.

2. The combination with a shaft of an in. tegral pulley rotatable relative to the shaft,

said pulley having an annular oil reservoir in its inner surface.; sleeves 'interposedV between said shaft and pulley at each side of the oil reservoir, the'inner ends of thefsleevesA being spaced from one another, each of said sleeves having an annular collecting groove on its inner surfacezadjacent its outer lend; a Y

and L a Ylongitudinal groovervineits outer face leading from the collecting groove back tothe oil reservoir; and an oil distributor mounted onsaid shaft between-the sleeves, said distributorcomprising a ring of lesser diameter Y than the bore of the pulley and oflesser vvidth than the space betvveenthesleeves, i i 'said ring having a plurality of'removableradially directedpins proj ectiong therefrom, f

the p'u'lleyhaving a hole formedthrough itsu "face opposite said vring through Which the pinis accessible. j 8, The combination With a shaft of an in-4 Vtegral pulley'rotatable relative tothe shaft,

said pulley havinganl annular oil reservoir V,in its inner surface; sleeves interposed be- Vtween said shaft andy pulleyateach side of the oil reservoir,vthe inner ends of the sleeves .Y

Y 'being spaced .from one another, each of said sleeves having an annular'collectlng groove IKao on its inner surface Vadjacent its outer end,

a longitudinal groove in its inner face leading from thespace between the sleeves part i WaytoWards the annular groove, and a longi- V tudinal groove in its outer face Yleading from the collecting groove back to the oil reser- T ivoir;fand anoil distributor mounted on said shaft between. the sleeves, said Vdistributor comprising aring of lesser diameter than the Y, bore- V of the vpulleyand oflesser Width than the spacebetvveen the sleeves, said ringvhavi ing a plurality of removable radiallydirectsaid ring through Which'the pin is accessible; f. ,i Signed atthe city of Toronto, Canada, this ing a hole formed through its face opposite 20th day of March, 1930.

GEORGE MALco'LM. 

